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# Senior IBM i (Series/ A/S 400) Systems & Operations Administrator

- **Company:** Mag Llc.
- **Location:** Pomona, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Db2400, Microsoft Access, Microsoft Windows, Active Directory, IBM System I, Backup Devices, Batch Processing, Dynamic Host Configuration Protocol, Disaster Recovery, Domain Name System (DNS), IBM Hardware Management Console, IBM RPG (Programming Language), Virtual Private Networks (VPN), Job Scheduling, Windows Servers, Networking Basics, Standard Sql, Software Engineering, SQL Databases, Subsystems, TCP/IP, Network Switches, Firewalls (Computer Science), Control Language, Data Management, Ibm Power Systems
- **Published:** October 19, 2026
- **Apply:** https://www.thejobnetwork.com/job/948c49a4-0730-4f50-a590-6ef1f412bee8/senior-ibm-i-series-as-systems-operations-administrator

## About the Role

* 5+ years of hands-on IBM i / iSeries / AS/400 systems administration or operations experience.
 * Strong knowledge of IBM i work management, batch processing, jobs, queues, subsystems, messages, and spool management.
 * Experience with IBM i operating-system maintenance, PTFs, IPLs, backups, and recovery.
 * Experience supporting month-end, year-end, or other production processing cycles.
 * Working knowledge of IBM i security, user profiles, and authorities.
 * Strong troubleshooting and problem-solving skills.
 * Solid Windows PC and general end-user support experience.
 * Working knowledge of TCP/IP and common business networking concepts.
 * Ability to work independently and take ownership of issues through resolution.
 * Strong documentation and communication skills.

Preferred Qualifications

Experience with any of the following is beneficial:

 * IBM Hardware Management Console (HMC)
 * IBM Power Systems
 * IBM i Access Client Solutions (ACS)
 * CL commands or basic CL programming
 * DB2 for i and SQL
 * Job scheduling and automation tools
 * Manufacturing, ERP, accounting, inventory, or distribution systems
 * EDI and automated file-transfer processes
 * Microsoft 365, Active Directory / Entra ID, and Windows Server
 * Network switching, firewalls, VPNs, and enterprise storage

RPG programming experience is a plus, but is not required. Familiarity with RPG, SQL, or CL can be helpful when troubleshooting applications and production jobs; however, this position is focused primarily on IBM i systems administration and operations rather than software development.

## Description

* Administer and maintain IBM Power Systems running IBM i / iSeries / AS/400.
 * Monitor system health, performance, storage, jobs, queues, subsystems, messages, and spool files.
 * Perform IBM i upgrades, PTF installation, IPLs, and planned system maintenance.
 * Manage user profiles, authorities, licensed programs, and system access.
 * Monitor and troubleshoot daily, nightly, monthly, and annual batch processing.
 * Support month-end and year-end processing, including job execution, troubleshooting, reporting, and coordination with Accounting.
 * Manage and verify IBM i backups, restores, and disaster-recovery procedures.
 * Troubleshoot failed jobs, system messages, connectivity issues, and production problems.
 * Maintain clear system, operational, backup, and processing documentation.
 * Provide hands-on support for Windows PCs, printers, Microsoft 365, IBM i client connectivity, and general end-user issues.
 * Assist with basic networking and connectivity troubleshooting, including TCP/IP, DNS, DHCP, VPNs, switches, and related systems.
 * Coordinate with IBM, software providers, and other technical vendors when escalation is required.

Occasional after-hours work may be required for system maintenance, upgrades, month-end processing, or other business-critical activities.